MESON Chess Problem Database

Problem Display
PID: 17202 (5RQ1/3Np2K/8/2p5/4k1P1/1N1n4/1pqB2Pn/1Brb2b1 w - - 0 1)

Mansfield, Comins

L'Alfiere di Re, 1925

5RQ1/3Np2K/8/2p5/4k1P1/1N1n4/1pqB2Pn/1Brb2b1

#2

9 + 10

3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb3
      • 2.Rf4#
    • 1...Qxd2
      • 2.Qe6#
    • 1...Qc3
      • 2.Rf4#
    • 1...Qc4
      • 2.Rf4#
    • 1...Sf2
      • 2.Qc4#
    • 1...e5
      • 2.Sf6#
  • Tries
    • 1.Sf6+?
      • 1...Ke5
        • 2.Qd5#
      • 1...exf6!
  • Keys
    • 1.Rf2!
      • threat
        • 2.Qa8#
      • 1...Qxb3
        • 2.Rf4#
      • 1...Qxd2
        • 2.Qe6#
      • 1...Sxf2
        • 2.Qc4#
      • 1...Se1
        • 2.Qc4#
      • 1...Sb4
        • 2.Qc4#
      • 1...Sf4
        • 2.Qc4#
      • 1...Se5
        • 2.Sdxc5#
      • 1...Qc4
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(e);P_SPINS(g),XS(D)::R1(H)
    • Q(e);P_SPINS(g),XB(B)::QAR2(I)
    • Q(e);P_SPINS(g)::R1(H)
    • S(g);P_SPINQ(e),S_CUTB(c)::QAR2(I)
    • P(j);N_GUARD,SBLOCK::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(h);P-FLIGHT::QAR1(I)
      • Refutation
        • P(j);XS(F)
  • Actual
    • R(H);
    • Threat
      • QAB(I)
    • Vars
      • Q(e);P_SPINS(g),XS(D)::R1(H)
      • Q(e);P_SPINS(g),XB(B)::QAR2(I)
      • S(g);P_SPINQ(e),XR(H)::QAR2(I)
      • S(g);P_SPINQ(e)::QAR2(I)
      • S(g);N_GUARD,P_SPINQ(e),SBLOCK::S(F),XP(i)
      • Q(e);P_SPINS(g)::R1(H)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).